04-10-2013, 06:50 PM
What load?
Brass:
Primer:
Powder:
Charge weight:
COAL:
60ft-lbs is plenty for the AR15 barrel nut. DO not try to go to the next tooth slot on the barrel nut, as you could possibly exceed 80ft-lbs and compress your receiver face & threads.
Even with the gun not free-floated, it shouldn't be shooting that erratically, but it doesn't surprise me considering the barrel source. Some of those AR-Stoner barrels have worked out great for people, and others not so much. 7" groups at 100yds is about twice the acceptable standard for a mass-produced military rifle.
I have an economy barrel from AA that cost under $270 with the bolt, and it shoots anywhere from .79"-1.1" at 100yds, and 1.69"-2.18" at 200yds with factory ammunition. It is very consistent in that regard. Bwild97 has a 24" J&T upper with a button-rifled economy barrel that shoots 10rd groups into sub-1/2 MOA, with several different loads, and he has page after page of excellent accuracy results with that rifle and probably the widest variety of loads shot on the forum.
Most Grendel owners are disappointed if their rifles don't shoot at least 1 MOA at 100yds.
Brass:
Primer:
Powder:
Charge weight:
COAL:
60ft-lbs is plenty for the AR15 barrel nut. DO not try to go to the next tooth slot on the barrel nut, as you could possibly exceed 80ft-lbs and compress your receiver face & threads.
Even with the gun not free-floated, it shouldn't be shooting that erratically, but it doesn't surprise me considering the barrel source. Some of those AR-Stoner barrels have worked out great for people, and others not so much. 7" groups at 100yds is about twice the acceptable standard for a mass-produced military rifle.
I have an economy barrel from AA that cost under $270 with the bolt, and it shoots anywhere from .79"-1.1" at 100yds, and 1.69"-2.18" at 200yds with factory ammunition. It is very consistent in that regard. Bwild97 has a 24" J&T upper with a button-rifled economy barrel that shoots 10rd groups into sub-1/2 MOA, with several different loads, and he has page after page of excellent accuracy results with that rifle and probably the widest variety of loads shot on the forum.
Most Grendel owners are disappointed if their rifles don't shoot at least 1 MOA at 100yds.